JPS6038468Y2 - Thread winding stand for overlock sewing machine - Google Patents

Description

[Detailed description of the invention] This invention relates to the bobbin stand of an overlock sewing machine, and in particular, the bobbin stand with multiple thread stand parts is connected to the sewing machine frame.
The sewing machine is designed to be movable and fit into a use position and a storage position, and is intended to facilitate fabric handling operations during sewing and to reduce the volume of the sewing machine when packed.

In this type of overlock sewing machine, in order to supply different threads to the needle and looper forming the overlock stitch, the needle and double ring looper forming the double chain stitch, etc. For these reasons, multiple thread stand sections are arranged in parallel, and in order to smoothly feed the sewing thread, these thread stand sections need to be arranged in parallel in a direction that intersects with the fabric feed direction of the sewing machine. The bobbin winding stand is formed to be considerably long in the direction intersecting the cloth feeding direction of the sewing machine.

Therefore, when in use, this type of bobbin stand is fixed to the machine frame using screws or a fitting part provided between the bobbin stand and the machine frame, and when stored, it is removed from the machine frame to reduce the packing volume. It is necessary to pack it separately from the frame, which complicates the packaging work and has disadvantages such as the bobbin stand being lost.

Also, if you try to reduce the volume during packaging by fixing both sides of the bobbin winder in the longitudinal direction at positions that almost match the width of the sewing machine frame as shown in Figure 2, then one end of the bobbin winder will be fixed at a position that almost matches the width of the sewing machine frame, as shown in Figure 2. This has the disadvantage that it protrudes in the direction ahead, obstructs the handling of cloth during sewing work, and reduces work efficiency.

This invention aims to eliminate the above-mentioned conventional drawbacks.

Examples of this invention will be described below with reference to the drawings.

As shown in Figures 1 and 2, the machine frame 1 of the sewing machine has a bed 2.
A bundle 5 is formed above the arm 4.

Reference numeral 6 denotes a well-known presser foot supported by the arm 4, and a presser foot 7, which constitutes a part of the sewing section of the sewing machine, is fixed to the lower end of the presser foot bar.

8 is a pulley, which is fixed to the main shaft (not shown) of the sewing machine.

Reference numeral 9 denotes a support stand integrally molded from a plastic material, which will be explained with reference to Fig. 6.7.8.

10a and 10b are a pair of fitting protrusions protruding from the upper surface of the support base 9, lla and llb are recesses formed in front of the fitting protrusions 10, 12 is a hole formed at the bottom of the recess, and 13 is a support base. 9 is a screw hole for fixing to the top surface of the bed 2, and 14 is a cylindrical portion that fits into a hole (not shown) opened in the top surface of the bed 2.

Reference numeral 15 denotes a bobbin stand made of plastic material, which will be explained with reference to Fig. 3.4.5.

16 are four thread stand portions standing upright from the top surface of the bobbin winder stand 15;
Reference numeral 17 denotes a mounting portion for a cylindrical thread guide rod 18 that protrudes downward from the front of the central portion of the bobbin winding stand.As shown in FIG. 5, the lower end of the thread guide rod 18 is fitted into the hole 18 of the mounting portion 17. The thread guide rod 18 is fixed to the mounting part 17 from the lower surface of the mounting part 17 with a screw 20, and the outer diameter of the mounting part 17 is provided so that it can be loosely fitted into the recess 11a or 11b of the support base 9.

21a, 21b, and 21c are fitting recesses formed at equal intervals on the lower surface of the bobbin winding stand 15, and fitting protrusions 10a of the support base 9,
10b, and the interval A between these fitting recesses is
, A is formed to be equal to the distance A between the fitting protrusions 10a and 10b of the support base 9.

Further, the thread guide rod 18 is configured to be vertically expandable and retractable, and has a horizontally long thread guide 23 formed at its upper end with thread guide holes 22 formed at positions corresponding to the upper parts of the respective thread stands 16. To support.

This invention has the above-mentioned configuration. First, the support stand 9 is placed against the top surface of the bed 2 on the back side of the vertical body part 3 of the sewing machine frame 1.
After fitting the cylindrical portion 14 into a hole (not shown) formed on the top surface, a set screw (not shown) is screwed into the screw hole (not shown) formed in the bed 2 from above the screw hole 13,
The support stand 9 is fixed to the bed 2.

Next, in order to set the bobbin winder stand 15 to the use position shown in FIG. At the same time, the fitting protrusion 10a of the support base 9 is made to face the fitting recess 21b of the bobbin winding stand 15, and the fitting protrusion 10b is made to face the fitting recess 21a, so that the fitting protrusion and the fitting recess are mate.

As a result, as shown in FIG. 1, the bobbin winding stand 15 has one left side in the longitudinal direction protruding to the left of the sewing machine frame 1, and the other right side to the left of the sewing machine sewing part in the cloth feeding direction. Be biased.

In addition, when packing the sewing machine in the usage position shown in Figure 1, lift the bobbin winder stand 15 in the usage position shown in Figure 1 upwards to ensure that the fitting protrusion and the fitting recess in the above-mentioned hollow area fit together. After removing it, move the bobbin bobbin stand 15 to the right by the distance A, loosely fit the attachment part 17 of the bobbin bobbin stand 15 into the recess 11b of the support base 9, and fit the bobbin bobbin stand 15 into the fitting protrusion 10b of the support base 9. The fitting recesses 21b are made to face each other, the fitting protrusions 10a are made to face the fitting recesses 21c, and the fitting protrusions and the fitting recesses are fitted together.

As a result, as shown in FIG. 2, the bobbin winding stand 15 is placed in a storage position where both sides in the longitudinal direction substantially match the width of the sewing machine frame 1, and the sewing machine is packed in this state.

Note that the front end surface of the bobbin winding stand 15 in FIGS. 1 and 2 is located inward from the front end surface of the bed 2, although not shown.

As described above, the bobbin winder stand 15 in this invention has a storage position where both sides of the bobbin winder stand 15 in the longitudinal direction are approximately equal to the width of the sewing machine frame 1 with respect to the sewing machine frame 1, and a storage position where one side in the longitudinal direction is the same as the width of the sewing machine frame 1. Since it can be attached and detached to the use position where it protrudes from one side and the other side is biased to one side than the leading force in the cloth feeding direction of the sewing machine sewing part, when packing the sewing machine, the sewing machine frame 1
There is no need to separate the bobbin spool stand and the bobbin spool stand 15, which prevents the spool stand from being lost, and reduces the packaging volume.Furthermore, when the spool stand is in the use position, one end of the spool stand is located closer to the fabric feed direction than the sewing machine seam. Since it does not impede the handling of the fabric at the front end, it has the effect of improving sewing work efficiency, and also has the effect of making it easy to move the bobbin winding stand to the above two positions, resulting in excellent operability.

In the illustrated embodiment, the support stand 9 is separate from the bed 2, and two fitting protrusions are formed on the waist support stand 9, and the bobbin stand 15
Bed 2 is shown in which two fitting recesses are formed.
A fitting protrusion may be formed directly on the support base 9, a fitting recess may be formed on the bed 2, and a fitting protrusion may be formed on the bobbin winding stand 15.
Alternatively, even if these fitting portions are provided at one location, the same effects as in the illustrated embodiment can be obtained.

[Brief explanation of drawings]

Figure 1 is a rear view of the sewing machine with the bobbin spool stand in the operating position, Figure 2 is a rear view of the sewing machine with the spool stand in the storage position, and Figure 3
The figure is a back view of the bobbin winding stand, Figure 4 is a cross-sectional view taken along IV-IV in Figure 3, Figure 5 is a cross-sectional view taken along ■-■ in Figure 3, Figure 6 is a plan view of the support base, and Figure 7 is a FIG. 6 is a cross-sectional view taken along the line ■-■ in FIG. 6, and FIG. 8 is a cross-sectional view taken along the line ■-■ in FIG. In the figure, 1 is the machine frame, 2 is the bed, 3 is the vertical trunk, 4 is the arm,
Reference numeral 9 indicates a support base, 10a and 10b are fitting protrusions, 15 is a bobbin stand, and 21a, 21b, and 21c are fitting recesses.

Claims (1)

[Scope of Claim for Utility Model Registration] A bobbin stand is placed behind the machine frame of an overlock sewing machine, and a bobbin stand that supports a plurality of long bobbins in parallel in a direction that intersects with the cloth feeding direction of the sewing machine is installed against the machine frame of the sewing machine. , the storage position where both longitudinal sides of the bobbin winder stand almost match the width of the sewing machine frame, and one longitudinal side protrudes from one side of the sewing machine frame and the other side is biased to one side of the sewing machine seam section in the cloth feeding direction. The bobbin winder of the overlock sewing machine can be attached and detached in the operating position.